Influence of water deficit on transpiration and radiation use efficiency of chickpea (Cicer arietinum L.)

Singh, P and Rama, Y V S (1989) Influence of water deficit on transpiration and radiation use efficiency of chickpea (Cicer arietinum L.). Agricultural and Forest Meteorology, 48 (3-4). pp. 317-330. ISSN 0168-1923

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Information on the relationship between biomass production, radiation use and water use of chickpea (Cicer arietinum L.) is essential to estimate biomass production in different water regimes. Experiments were conducted during three post-rainy seasons on a Vertisol (a typic pallustert) to study the effect of water deficits on radiation use, radiation use efficiency (RUE), transpiration and transpiration efficiency (TE) of chickpea. Different levels of soil water availability were created, either by having irrigated and non-irrigated plots or using a line source. Biomass production was linearly related to both cumulative intercepted solar radiation and transpiration in both well watered and water deficit treatments. Soil water availability did not affect RUE (total dry matter produced per unit of solar radiation interception) when at least 30% of extractable soil water (ESW) was present in the rooting zone, but below 30% ESW, RUE decreased linearly with the decrease in soil water content. RUE was also significantly correlated (R2 = 0.61, P < 0.01) with the ratio of actual to potential transpiration (T/Tp) and it declined curvilinearly with the decrease in T/Tp. TE decreased with the increase in saturation deficit (SD) of air. Normalization of TE with SD gave a conservative value of 4.8 g kPa kg−1. To estimate biomass production of chickpea in different environments, we need to account for the effect of plant water deficits on RUE in a radiation-based model and the effect of SD on TE in a transpiration-based model

Item Type: Article
Subjects: Mandate crops > Chickpea
Others > Agriculture-Farming, Production, Technology, Economics
Depositing User: Mr B K Murthy
Date Deposited: 31 May 2014 06:50
Last Modified: 31 May 2014 06:50
Official URL:
Acknowledgement: We thank Messrs. S. Ramakrishna, P.V.V. Satyanarayana and R. Mukunda Reddy for their assistance in the field, and Mr. K.P.C.S. Raju for typing the manuscript.
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